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Poly(3-hexylthiophene) Nanorods with Aligned Chain Orientation for Organic Photovoltaics

  1. Jong Soo Kim2,
  2. Yunmin Park1,
  3. Dong Yun Lee1,
  4. Ji Hwang Lee2,
  5. Jong Hwan Park1,
  6. Jin Kon Kim1,*,
  7. Kilwon Cho1,*

Article first published online: 11 JAN 2010

DOI: 10.1002/adfm.200901760

Issue

Advanced Functional Materials

Advanced Functional Materials

Volume 20, Issue 4, pages 540–545, February 22, 2010

Additional Information

How to Cite

Kim, J. S., Park, Y., Lee, D. Y., Lee, J. H., Park, J. H., Kim, J. K. and Cho, K. (2010), Poly(3-hexylthiophene) Nanorods with Aligned Chain Orientation for Organic Photovoltaics. Adv. Funct. Mater., 20: 540–545. doi: 10.1002/adfm.200901760

Author Information

  1. 1

    Department of Chemical Engineering Polymer Research Institute Pohang University of Science and Technology Pohang, 790-784 (Korea)

  2. 2

    School of Environmental Science and Engineering Polymer Research Institute Pohang University of Science and Technology Pohang, 790-784 (Korea)

*Department of Chemical Engineering Polymer Research Institute Pohang University of Science and Technology Pohang, 790-784 (Korea)

Publication History

  1. Issue published online: 12 FEB 2010
  2. Article first published online: 11 JAN 2010
  3. Manuscript Revised: 17 SEP 2009
  4. Manuscript Received: 19 AUG 2009

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Keywords:

  • Conductivity;
  • Heterojunctions;
  • Nanorods;
  • Photovoltaic cells

Abstract

A structured polymer solar cell architecture featuring a large interface between donor and acceptor with connecting paths to the respective electrodes is explored. To this end, poly-(3-hexylthiophene) (P3HT) nanorods oriented perpendicularly to indium tin oxide (ITO) glass are fabricated using an anodic aluminum oxide template. It is found that the P3HT chains in bulk films or nanorods are oriented differently; perpendicular or parallel to the ITO substrate, respectively. Such chain alignment of the P3HT nanorods enhanced the electrical conductivity up to tenfold compared with planar P3HT films. Furthermore, the donor/acceptor contact area could be maximised using P3HT nanorods as donor and C60 as acceptor. In a photovoltaic device employing this structure, remarkable photoluminescence quenching (88%) and a seven-fold efficiency increase (relative to a device with a planar bilayer) are achieved.

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